Underwood, A. C. (1925). Conversion: Christian and non-Christian; a comparative and psychological study. The Macmillan company.
Lua i Stíl Chicago (17ú heag.)Underwood, A. C. Conversion: Christian and Non-Christian; a Comparative and Psychological Study. New York: The Macmillan company, 1925.
Lua MLA (8ú heag.)Underwood, A. C. Conversion: Christian and Non-Christian; a Comparative and Psychological Study. The Macmillan company, 1925.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.